Thanks for helping me 
Red - 200 mW
Green - 200 mW
Blue - 6x
I have chosen the green laser! ~Click me~
Red - 200 mW
Green - 200 mW
Blue - 6x
I have chosen the green laser! ~Click me~
Last edited:
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ArcticMyst Security by Avery
What color will burn stuff the best?
- Thread starter blaize9
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Kenom
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I would go with the 200mw FLX. Im planning on getting that laser + iv only heard good reviews bout that laser
EDIT: this is just my opinion. I do not know much about the blu ray laser
EDIT: this is just my opinion. I do not know much about the blu ray laser
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lol. Pm me a review if your not gana make a public 1. Im still a tad bit unsure about buying it
I will Pm or post a review on it, and i too have heard very good things about that laser the only con is that it has a 60 sec cycle :yabbmad:
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405nm
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Why do shorter wavelengths have more power? Is it because there is are more "waves" or peaks per unit of distance? I know shorter wavelengths can be focused smaller, but I don't think most enthusiasts can focus the beam to that small of a point very readily so that shouldn't really matter, right?
I've never had 2 different color lasers close enough to the same power level to test.
I've never had 2 different color lasers close enough to the same power level to test.
joekane
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I picked up that green one recently and was/am pretty damn happy with it.
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it is because the lower on the electromagnetic sprctrum you get, the more photons in the light there are
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If you have 2 different lasers that have the same power (for example red and green laser: P=200mW) you would be able to burn stuff in the same time with both lasers. That is because both lasers will give the same amount of energy to that stuff you would like to burn in the same time t.
E=P*t
Light is electromagnetic wave, so it has amplitude, frequency and phase. If you have 2 laser with different frequencys (different colors) and equal amplitudes, higher power will have the laser with higher frequency:
E=h*f
Imagine sea waves. Higher power has wave that hitts some cliff 20 times in minute than wave that hitts the cliff 10 times in minute (if they have equal height).
You also have waves that appears once or twice per year but ther height is pretty much higher than regular sea wave height, so their energy is bigger than energy of regular sea wave. If I'm not wrong, same is with monocromatic laser light.
Can someone who knows that better than me check what I've just written? :yh:
E=P*t
Light is electromagnetic wave, so it has amplitude, frequency and phase. If you have 2 laser with different frequencys (different colors) and equal amplitudes, higher power will have the laser with higher frequency:
E=h*f
Imagine sea waves. Higher power has wave that hitts some cliff 20 times in minute than wave that hitts the cliff 10 times in minute (if they have equal height).
You also have waves that appears once or twice per year but ther height is pretty much higher than regular sea wave height, so their energy is bigger than energy of regular sea wave. If I'm not wrong, same is with monocromatic laser light.
Can someone who knows that better than me check what I've just written? :yh:
intrigue
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it is because the lower on the electromagnetic sprctrum you get, the more photons in the light there are
There is also a higher energy per photon (see Kenom's link above) at shorter wavelengths. The energy of an individual photon is directly linked to the wave frequency(frequency = speed of light (in meters/sec) / wavelength (in meters), which gives you the per-second frequency (hertz)).
So, frequency of bluray: 300,000,000 m/s divided by 405nm (405x10^-9 meters) is around 740x10^12 Hz or 740THz; whereas green is around 563THz.
The easiest way to find the energy of a photon (without having to calculate it's wave frequency) is: Energy = planck's constant (h) * speed of light (c) / wavelength in nanometers.
The easiest way to calculate that is to go into google and type: h*c/405 nm (where we find that BluRay is around 4.9x10^-19 joules, as opposed to green, which is around 3.7x10^-19 joules).
Damien
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All the lurker physicists come out for this one.
Interesting thread.
Interesting thread.
intrigue
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Even though shorter wavelengths have more energy per photon, we measure laser output not in energy but in power (watts, milliwatts, etc). A watt is a defined as 1 joule per second. So you can see that power is the rate at which energy is created/consumed.
One watt of green is equal to one watt of violet in terms of power, which means that one watt of green equals one watt of violet equals one joule/second. Wavelength here is relevant only in it's ability to be absorbed by materials of different color.
